There are __________ fundamental building blocks for the clay mineral structures.
Silica tetrahedral unit and octahedral unit are the 2 building blocks of clay mineral.
In silica tetrahedral unit, the silicon structure is enclosed by __________
In silica tetrahedral unit, four oxygen or hydroxyls have the configuration of tetra hadron.
Octahedral unit, consist atoms of __________ element.
In octahedral unit, aluminum, iron or magnesium atom are enclosed in six hydroxyls having the configuration of an octahedron.
The silicon sheet is represented by ___________ symbol.
The silicon sheet is represented by trapezoidal symbol, representing the oxygen basal layer and hydroxyl apex layer.
The 15 clay minerals are mainly divided in to ________ groups.
Clay minerals are classified into 3 groups of kaolin, montmorillonite, illite and palygorskite.
The kaolinite structural unit is made up of ____________ layer or sheet.
The kaolinite structural unit is made up of gibbsite sheet with aluminum atoms at their centers.
In kaolinite crystal, the layers are held by _________ bond.
Since kaolinite is stable and water is unable to penetrate between the layers, they are held by a fairly strong bond of hydrogen.
Kaolinite exhibit the characteristic of ___________
The platelets in kaolinite carry negative charges which attract thick layers of adsorbed water thereby producing plasticity.
An Example of kaolinite crystal or mineral is ___________
China clay show the property of plasticity, when mixed with water therefore it can be taken as an example for kaolinite crystal.
The illite crystal has a great tendency of _______________ properties.
The cationic bond of illite is weaker than the hydrogen bond of kaolinite, but is stronger in water bond. Due to this, illite crystal has a great tendency to split in to ultimate platelets.